Supplier Page from Thermo Fisher Scientific for 2,4,6-Triisopropylbenzenesulfonyl azide, 97%, contains 15% water as stabilizer
4-Bromobutyric acid, 98% from Thermo Fisher Scientific
D-Mannitol, 98+% from Thermo Fisher Scientific
Ethyl chrysanthemate, 95%, mixture of cis and trans from Thermo Fisher Scientific
trans-4-Hydroxy-L-proline, 99+% from Thermo Fisher Scientific